GUILLET, Yannick; ABBAS, Allaoua; RAVAINE, Serge; AUDOIN, Bertrand

doi:10.1063/1.5085157

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GUILLET, Yannick

ABBAS, Allaoua

RAVAINE, Serge

Centre de Recherche Paul Pascal [CRPP]

Idioma

Article de revue

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Applied Physics Letters. 2019-03-04, vol. 114, n° 9, p. 091904

American Institute of Physics

Resumen en inglés

The vibrational landscape of an250 nm-radius single gold nanoparticle dropped on a silica substrate is imaged with an ultrafast pump-probe experiment in a transient reflectivity configuration. A movie of the picosecond dynamics of the nanoparticle is recorded over 20 ns. Aspatially resolved analysis of the spectrum of the transient reflectivity is also achieved. In addition to the axial oscillation of the nanoparticledriven by the normal contact stiffness and to the breathing mode of the nanoparticle, ultrafast microscopy allows us to reveal higher orderacoustic eigenmodes otherwise hidden by the noise in single point measurements. These results are confirmed by calculations of the acousticeigenfrequencies of the nanoparticle. The shear component of the particle surface displacement associated with the higher order modes is ofstrong interest for probing the elasticity of the surrounding medium in the GHz to THz range< Leer menos

Palabras clave en inglés

Nanoparticle

URI

https://oskar-bordeaux.fr/handle/20.500.12278/76776

DOI

http://dx.doi.org/10.1063/1.5085157

Proyecto ANR

Vibration GHz d'une nanoparticule unique : sonde d'élasticité locale à une échelle submicronique - ANR-11-JS09-0013

Orígen

Importado de Hal

Centros de investigación

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295